10 oz. GLOWING MARGARITA . Choose from: RED, BLUE, GREEN or YELLOW . Bend the plastic stem (only once) of the Margarita Glass and watch the excitement "glow". Great for Parties, Bars or create a Special drink. This product is designed to be Hand Washed Only (do not put in dish washer). The glass is reusable but the product will Glow one time only. For visual activation instructions please take a look at the available YouTube video by clicking on the YouTube icon above.